Park Seo-ham (박서함), born Park Gyeong-bok on October 28, 1993, in Siheung, South Korea, is a South Korean actor, singer, and rapper. Before focusing more on acting, he trained as an idol at Big Hit Entertainment and then at JYP Entertainment. He officially debuted in 2016 as a member of the group KNK under the name Park Seung-jun, before adopting his current name. He eventually left the group in 2021 to pursue a new career path.
His first steps as an actor date back to 2017 with Children of the 20th Century, in which he plays the younger version of Anthony. In 2019, he landed several major roles in web dramas, including that of Joo Woo-kyung in Just One Bite Season 2 and Yoon Soo in Dating Class. The following year, he played Eden in One Fine Week 2, and then appeared in 2021 in Dali and the Cocky Prince as a member of KNK.
The real turning point in his career came in 2022 with Semantic Error. Adapted from a popular BL web novel, the drama casts him in the lead role of Jang Jae-young, an outgoing design student whose turbulent relationship with Chu Sang-woo—played by Park Jae-chan—gradually evolves into a romance. The series’ success brought Park Seo-ham widespread recognition and several nominations, as well as a Popular Star Award at the Blue Dragon Series Awards. The project was also adapted into a feature film, Semantic Error: The Movie.
Shortly after the broadcast of Semantic Error, Park Seo-ham began his military service, which he completed in December 2023. His return to the screen came with more ambitious projects. In 2025, he played Jung Cheon in the historical drama The Murky Stream. In 2026, he played one of the leading roles in Our World, while making a cameo appearance in See you tomorrow at the office!.
He is also listed in the cast of Dive into You, in which he will play Jung Woo-jae, confirming his intention to focus his career primarily on dramas from now on.
